Writing your first data contract
A data contract turns an implicit handshake between producer and consumer into something your pipeline can enforce automatically, before data breaks.
SCIKIQ Academy12 Jul 2026 · 5 min readA data contract is an agreement on the shape, quality and service level of a dataset — expressed as code so it can be checked automatically. It moves the producer–consumer relationship from a wiki page nobody reads to a gate the build enforces.
Start small: pick one high-value table, declare its schema, mark the columns that must never be null or duplicated, and note who owns it. In dbt you can enforce this with a model contract and a handful of tests. When an upstream change would break the shape, the build fails before bad data reaches anyone downstream.
The cultural shift matters more than the syntax: the producer now owns a promise, and the consumer can build on it with confidence.